PURPOSE: To improve the surface appearance of molded item, fluidity at forming, filling properties of fiber to complicated shaped part and mechanical strength by a method wherein non- continuous reinforcing fibers are dispersed in materially graded structure, in which after layer is continuously changed from fiber layer having a larger number of filaments in strand to fiber layer having a smaller number of filaments in strand, in thermoplastic or thermosetting resin.

CONSTITUTION: Fed glass fibers 1 are opened by needle-like spikes planted on the surface of a cylinder 5 and directed to a bamboo hurdle conveyer 6, which moves in the direction indicated with the arrows and discharged downwards by means of the centrifugal force developed by the rotation of the cylinder. Among the glass fibers 1, fiber having a larger number of filaments in strand falls in the neighborhood just beneath the discharged position, slightly opened fiber bundle falls to the right side position of the above-mentioned discharged position and monofilament or fiber, which is opened nearly to monofilament, falls to the rightmost side position of the above-mentioned discharged position by flying. Onto the top face of the glass fiber non-woven fabric 10 produced at this time, fibers 11 opened to the form of monofilament are laminated and onto its under face, non-opened fiber bundles 13 are laminated and in its intermediate layer 12, in which fibers are continuously changed in layers from one, the opening of which is low or which has a larger number of filaments in strand (in lower layer) to one, the opening of which is high or which has a smaller number of filaments in strand.